You don't have to predict all of themand can just predict what you feel comfortable with.But also feel free to predict even more than that.

Here some additional insight that may (or may not) be useful:

Smash is tracking pretty well with over 900 preorder points on COMG, making it the second biggest Switch game on there with a shot at overtaking Splatoon 2 for the crown.COMG ratio is a bit weird these days so it could be between 1:700 to 1:2500.Recent Switch games have had a trend towards 1:2000 but none of those were remotely as big as Smash so probably not a good example.

Switch hardware is widely available, only the budled (Smash, SMP) stock has gotten a bit low.It would seem that Smash has over 1.5M shipped copys for its launch.Both those things were said by Chris1964 on Era. How much you put faith in his words is on you.

PS4 is getting a deal in Japan. Console is 5000 yen off (~$45) and comes with two free games.Just Cause 4 has not been doing well on COMG or on amazon and initial reactions were pretty bad.

Smash: 1.8 million. COMG ration will likely be between 1:1500 and 1:2500. Unless it's some kind of really low anomaly, that's where it'll be, and at 1:2000 that would put it at 1.8 million, not even all that outlandish.
Switch 300k. You gotta figure it's going to do better than Pokemon's week by a pretty good amount.
PS4 40k. A slight jump from the previous week as the holidays approach and the sales takes effect.
Just Cause 10k. I dunno. Can't be much higher, but even a decent COMG ratio would give it 10k.